I guess. It really isn't improved at all from the PS2 days other than some better graphics on some stuff and just more stuff. Same terrible menus, same hatred of analog acceleration, same weak sound, same lack of any meaning in collisions. So if you want a GT fix without spending $60 (and getting nearly the same game yet again just with less stuff) then yes it's worth $10. I wish there was another option on the PS side for that kind of racing, Forza has really left GT in it's dust.
Oh and the leveling and car buying stuff are just stupid and awful and there's a reason they ditched them in 6.